The HSi 255 in- wall effortlessly reproduces the all subtleties of today’s most dynamic digital sources for a more realistic entertainment experience, delivering improved bass performance from a 5-1/4-inch woofer and crystalline high-frequency response from a 3/4-inch Kortec® tweeter. It’s a solid performer in the Boston tradition.

• 3/4-inch tweeter
• 5-1/4-inch woofer
• Easy-install features for existing walls or ceilings
• Paint-ready surface allows you to match your wall or ceiling finish
• Reduced Bezel Design for seamless integration with the wall or ceiling
• Magnetic grilles for easy installation
• Optional new construction bracket NCB5

Recommended Amplifier Power
10-90 watts
Nominal Impedance
8 ohms
Frequency Response (±3dB)
75Hz-20kHz
Mounting Depth (from surface)
2-3⁄8" (60mm)

Bass Unit
5-1⁄4" (135mm)
Crossover Frequency
6500Hz
Sensitivity (1 watt (2.83v) at 1m)
90dB
Tweeter
3/4" (19mm) Kortec dome
External Dimensions
10-1⁄8 x 7-1⁄2"(257 x 191mm)

Mounting Hole Cutout
8-15⁄16 x 6" (228 x 152mm)